Propeller-wheel.



No. 817,494. PATENTED APR. 10, 1906. A. H LITTLE.

PROPELLEPJ WHEEL.

AIPLIGATIQH rum) June. 1905.

PATENT OFFICE.

' ALBERT HENRY LITTLE, or NEW YORK, N. Y.-

' PRUPELLEH-WHEEIL.

No; eimea. I

Specification of Letters Patent. Application filed July 29, 1905. serial No. 271.782.

Patented April 16, 1906.

To all whom it may concern:

' Be it known that l, ALBERT HENRY L11 TLE, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of N ew York, have invented a new and Improved Propeller-Wheel, of which the following is a full, clear, and exact description.

' scoops extending from the blades at .an angle.

My invention relates to a screw or similar propeller; and the principal ob'ect thereof is to provide means on the bla es for acting Reference is to be had to the accompanying drawings, formin a part of this specification, 1n which S1II11 ar characters of reference' indicate corresponding parts in all the Figure 1 isan end elevation of a pro eller, showing my mvention. Fig. 21s a s1 e elevation of the same, and Fi .3 is a lon itudinal central sectional view 0 one of the lades of the propeller;

.The hub a of the wheel may be of the usual .or any desired construction, and it is provided with a pluralit of blades 7), as usual, these blades preferab y being an ularly disposed so as to form what is called a screwpropeller. On the rear of each blade near its outer end ll place a concave projection or portions of the propeller blade itself.

scoop c. This scoop preferably extends at an angle of about forty-five degrees from the side 0 the blade and slopes obliquely therefrom in a lane transverse to the plane of the blade. T e top of the scoop is therefore about the same distance away from the hub as the end of the blade; but it may conveniently extend farther than this. The scoop is preferably madeof solid steel, and in proportions is designed according to the p12- s considerable pressure is applied to the scoo inthe rotation of the wheel in the water provide a strengthening device'in the form of arigid brace or rib d. This rib is provided with an angular shoulder at its inner end, which rests against the circumference of the hub, and is provided with a projection (1 at its outer end, having, an upper surface corresponding to the lower surface of the scoop, which rests upon it. Although this rib is either secured to the propellerblade or integrally mounted thereon it will be seen that on account of the shape of the two ends .of the rib the pressure directed against the scoop will be transmitted to the hub through the rib without exerting any additional force upon the blade itself. rib is preferably small at the hub, growing gradually larger as it extends outward. In addition to transmitting strain from the scoop directly to the hub it adds to the.

stren th of the blade itself. The surface of the ri directly under the scoop is formed in such a manner as to give a maximum sustaining force to the scoop and the blade, and, as will be seen, it is substantially in the shape of the bowof an ordinary boat.

A propeller constructed'in accordance with the principle of my invention, whether in the form shown in'the drawings or not, is capable of exerting more power, and consequently of pro elling a boat at a greater speed, than a .prope ler constructed in the old way.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A propeller-blade havin a scoop pro vided with a concave outer ace pro ecting from its rear surface.

2. A propeller-wheel having a series of blades provided with scoops projecting therefrom, and means located adjacent to the blades for transmittin strains from the scoops directly to the ha of the wheel.

3. A propeller-wheel havin a series of blades, each being provided wit a rib on the rear surface thereof,said rib adually increasing in thickness from the ub out, and a scoop restin onthe end of said rib and near the end 0 the blade. I

at. A propellerwheel having a blade provided with a rib on the rear surface thereof extending longitudinally with respect to the blade, and a scoop resting on the end of said rib and near the end of the blade, whereby any pressure on the scoo will be'transmitted tothe hub of the wheel t ough said rib.

The

projecting therefrom, and a scoop mounted 7 5. A propeller-wheel having a hub, a blade name to this Specification in the presence of two subscribing witnesses.

at a distance from the end of said blade, said scoop projecting in an angular direction and i B T- HENRY L terminating at substantially the same dis- Witnesses: times from the hub as the end of said blade.- 7 ARTHUR HALLAM,

In testimony whereof I have signed my MARY E. BUTTGENBACR 

